Special and General Relativity Forum

Post thread
Join in expert discussion on special and general relativity discussion. Relativity is the dependence of various physical phenomena on relative motion of the observer and the observed objects.
Graduate How do I go about learning GR?
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Can Forces Be Interpreted as Christoffel Symbols in General Covariance Contexts?
  • · Replies 10 ·
Replies
10
Views
4K
Graduate Wormholes aren't ruled out in the wonderful universe of relativity
  • · Replies 3 ·
Replies
3
Views
4K
Graduate Questions regarding relativistic momentum
  • · Replies 1 ·
Replies
1
Views
2K
Graduate C maximized in its own direction, so v > c possible ?
  • · Replies 28 ·
Replies
28
Views
6K
Graduate Particle Lifetime in Gravity: Experimental Evidence?
  • · Replies 7 ·
Replies
7
Views
3K
Graduate Time, Light, and Relativity: Photons from the Past
  • · Replies 4 ·
Replies
4
Views
2K
Graduate We can travel faster that light?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Alternate derivation of Lorentz Trans.
  • · Replies 38 ·
2
Replies
38
Views
9K
Undergrad At what speed would one day = one year?
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Analogy between centrifugal force and gravity
  • · Replies 10 ·
Replies
10
Views
5K
Undergrad What if something went faster than light?
  • · Replies 7 ·
Replies
7
Views
3K
Graduate Where Do 2nd Order Terms in Gauge Transformation Come From?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Photon interaction with gravity.
  • · Replies 2 ·
Replies
2
Views
3K
Graduate How can the rest observer conclude the photon travels at an angle?
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Antimatter time dialation/singularities
  • · Replies 5 ·
Replies
5
Views
2K
Graduate The effect of external masses on internal black hole geometry
  • · Replies 17 ·
Replies
17
Views
6K
Graduate Relativity, ultimate rigidity and the speed of light.
  • · Replies 15 ·
Replies
15
Views
4K
Graduate Does General Relativity actually explain gravity?
  • · Replies 9 ·
Replies
9
Views
6K
Graduate Some questions about time dilation (muon etc.)
  • · Replies 8 ·
Replies
8
Views
5K
Graduate Understanding The Twin Paradox
  • · Replies 17 ·
Replies
17
Views
4K
Graduate What is the result of this laser/time dilation scenario?
  • · Replies 12 ·
Replies
12
Views
3K
Graduate Solving the Geodesic equations for a space
  • · Replies 1 ·
Replies
1
Views
6K
Graduate What Does the X-vt Formula Reveal About Coordinate Systems?
  • · Replies 8 ·
Replies
8
Views
17K
Graduate What is time? Simply & Factually
  • · Replies 16 ·
Replies
16
Views
5K
Graduate Matter Lagrangian for perfect fluid
  • · Replies 5 ·
Replies
5
Views
8K
Graduate Can a star be seen approaching a black hole forever?
  • · Replies 25 ·
Replies
25
Views
6K
Graduate How is the Riemann tensor proportinial to the curvature scalar?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Understanding the Four Momentum of a Photon in General Relativity
  • · Replies 13 ·
Replies
13
Views
8K
Graduate CERN: Accelerating Particles to 99.99% Speed of Light
  • · Replies 6 ·
Replies
6
Views
10K
Graduate The nature of causality in special relativity (not faster than light travel)
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad How does speed affect time in Einstein's theory of relativity?
  • · Replies 1 ·
Replies
1
Views
3K
Graduate The relativity of time and defining the age of the universe
  • · Replies 5 ·
Replies
5
Views
4K
Graduate Time Dilation at Center of a Neutron Star
  • · Replies 2 ·
Replies
2
Views
6K
Graduate If an electron falls into a black hole?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Does Gravitational Time Dilation Affect Planetary Geology?
  • · Replies 30 ·
2
Replies
30
Views
16K
High School Measuring a Rod in a Running Train: Why?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Relativity interstellar travel question
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Infinite speeds would defeat time keeping
  • · Replies 6 ·
Replies
6
Views
3K
Graduate How to find that the universe is expanding from general theory of relativity
  • · Replies 7 ·
Replies
7
Views
3K
Graduate How Does Time Dilation Affect Aging in Moving Frames?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Do Lie and Covariant Derivatives Relate in Vector Field Manipulation?
  • · Replies 9 ·
Replies
9
Views
23K
Graduate Changes in mass and length at high speed
  • · Replies 19 ·
Replies
19
Views
5K
Graduate Please explain these Equations in GR, Modified Universal law of Gravity.
  • · Replies 1 ·
Replies
1
Views
3K
Graduate What is the significance of velocity in relativistic electromagnetism?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Initial conditions for BH in GR
  • · Replies 11 ·
Replies
11
Views
4K
Graduate What is an invarient observable in GR
  • · Replies 5 ·
Replies
5
Views
3K
Graduate The set of Lorentz boosts and space rotations form a group
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Painleve chart for FRW spacetime
  • · Replies 7 ·
Replies
7
Views
3K
Undergrad Observing and Experiencing Speed of Light
  • · Replies 14 ·
Replies
14
Views
4K
Graduate Is there mass without momentum?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate How does gravitational time dilation increase the spacetime interval?
  • · Replies 7 ·
Replies
7
Views
4K
Graduate Why is the speed of light same in all reference frames?
  • · Replies 10 ·
Replies
10
Views
25K
Graduate SR, Inertial frames, Movement, Testing
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad How would Earth's time slow down?
  • · Replies 7 ·
Replies
7
Views
3K
Graduate New animated video explaining Special and General Relativity.
  • · Replies 15 ·
Replies
15
Views
5K
Graduate The Poincaré Group and Geodesics in Minkowski Spacetime
  • · Replies 5 ·
Replies
5
Views
4K
Graduate Time for object to fall length of 10m rope, assuming g=10m/s
  • · Replies 2 ·
Replies
2
Views
3K
Graduate How fast can light change its direction?
  • · Replies 9 ·
Replies
9
Views
3K
Graduate What is the velocity of a photon?
  • · Replies 80 ·
3
Replies
80
Views
13K
Graduate Are My Calculations for Proper Time on a Rocket in General Relativity Correct?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Does the curvature of space-time create the illusion of distance shrinking?
  • · Replies 19 ·
Replies
19
Views
5K
Graduate Speed of light between a source and target moving wrt to each other
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Four-Momentum Invariant and Conservation Laws Yielding Contradictory Results
  • · Replies 4 ·
Replies
4
Views
4K
Graduate What do I see wrong here ? T2 = T1(1 - V/C)
  • · Replies 45 ·
2
Replies
45
Views
9K
Undergrad Why light is remains massless even if travelling w/ the fastest velocity?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Reciprocity of Time Dilation in General Relativity
  • · Replies 3 ·
Replies
3
Views
3K
Graduate General confusion with four velocity and four acceleration
  • · Replies 7 ·
Replies
7
Views
6K
Graduate Acceleration/deceleration questions
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Could the Michelson & Morley Experiment Have Used Electrons Instead of Light?
  • · Replies 11 ·
Replies
11
Views
4K
Graduate Do Corners Experience Stress in Curved Space?
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad Does Moving Train See Stationary Observer at .6c? - I'm Not Sure
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Is time slowing down or is it just taking a longer amount time?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Wikipedia quote on gravitational time dilation
  • · Replies 3 ·
Replies
3
Views
4K
Undergrad Mass increasing as velocity approaches c
  • · Replies 8 ·
Replies
8
Views
5K
Graduate A Relativity Experiment I'd Like to See
  • · Replies 21 ·
Replies
21
Views
4K
Graduate Space time curvature caused by fast electron
  • · Replies 59 ·
2
Replies
59
Views
12K
Graduate Trying to understand spacetime curvature
  • · Replies 15 ·
Replies
15
Views
4K
Graduate Block Time vs Q. Indeterminacy
  • · Replies 109 ·
4
Replies
109
Views
17K
Graduate Travel faster than speed of light. According to what reference frame?
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Question on Black Hole Metrics
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Faster than Light Travel Question
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Perceived time and distance at Speed of light
  • · Replies 17 ·
Replies
17
Views
9K
Graduate Quick tetrad/vierbein question
  • · Replies 7 ·
Replies
7
Views
4K
Graduate Understanding Frame of Reference in Special Relativity
  • · Replies 12 ·
Replies
12
Views
3K
Graduate Twin Paradox: Accelerating, Turning Back & Decelerating
  • · Replies 12 ·
Replies
12
Views
3K
Graduate What is the Significance of the Lambda Symbol in Transformation Matrices?
  • · Replies 1 ·
Replies
1
Views
5K
Graduate I don't understand photon clocks
  • · Replies 26 ·
Replies
26
Views
6K
Undergrad Does Relativity Theory Explain Why Racing Drivers Age Slower?
  • · Replies 6 ·
Replies
6
Views
4K
Undergrad How is relativity theory applied to gps?
  • · Replies 8 ·
Replies
8
Views
5K
High School Can We Really See Into the Past by Observing Distant Worlds?
  • · Replies 14 ·
Replies
14
Views
3K
Graduate How are the ways in which time is dialted unified?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Simple question about time dilation in accelerated reference frames
  • · Replies 10 ·
Replies
10
Views
4K
Undergrad How did light speed become the governor of relativity?
  • · Replies 31 ·
2
Replies
31
Views
6K
Graduate SR: Questions on Time Synchronization & Relativity
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Different Slices of Now Observable from Earth?
  • · Replies 37 ·
2
Replies
37
Views
10K
Graduate Can Negative Mass Really Defy Gravity?
  • · Replies 9 ·
Replies
9
Views
4K
Graduate What experiment shows that the universal speed limit is the same as light?
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Why Is Light Speed a Limit for Spacecraft?
  • · Replies 11 ·
Replies
11
Views
5K
Graduate I would like to see the math of something
  • · Replies 30 ·
2
Replies
30
Views
5K